Analog Devices EVAL-ADAQ7767-1 User Manual page 20

User Guide
EVALUATION BOARD SOFTWARE
CAPTURE SETTINGS
The output data rate (ODR:) is automatically calculated by the
software based on the selected ADC filter settings. By default,
ODR: is set to 256 kSPS (see
The Sample Count: is set to 8192 samples by default, but it can be
changed to a selection from the dropdown menu, ranging from 512
to 131072 samples.
Click Run Once in the CAPTURE SETTINGS section to start a
data capture of the samples at the sample rate specified in the
Sample Count dropdown menu. These samples are stored on the
FPGA device and are only transferred to the PC when the sample
frame is complete.
Click Run Continuously in the CAPTURE SETTINGS section to
start a data capture that gathers samples continuously with one
batch of data at a time, which runs the Run Once operation
continuously.
ANALYSIS
The General Settings section sets up the preferred configuration
of the fast Fourier transform (FFT) analysis. This configuration sets
the number of tones to analyze and the fundamental strategy to use
(see Figure 20).
The Windowing section sets up the preferred Window type to
use in the FFT analysis. This section also configures the other
parameters to include in the analysis (that is, the Number of
Harmonics, Fundamental Bins, Harmonic Bins, DC Bins, and
Worst Other Bins).
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Figure 20).
Figure 21. ADAQ7767-1 Board Waveform
EVAL-ADAQ7767-1
The Single Tone Analysis and Two Tone Analysis sections set
up the fundamental frequencies included in the FFT analysis. When
analyzing one frequency, use the Single Tone Analysis section,
and when analyzing two frequencies, use the Two-Tone Analysis
section.
RESULTS
Click Export to export the captured data. The waveform, histogram,
and FFT data are stored in .xml files along with the values of the
parameters at capture (see Figure
ADAQ7767-1 Board Waveform Tab
The Waveform Results (Volts) section displays time domain char-
acteristics of the signal, such as Sample Frequency, Samples,
Maximum, Minimum, RMS, Average, and Peak-to-Peak.
The waveform graph shows each successive sample of the µMod-
ule output. The user can zoom in on and pan across the waveform
using the embedded waveform tools.
Within the dropdown menu of the display unit (shown with the
Volts option selected in Figure
displays in units of hexadecimal, volts, or codes. The axis controls
are dynamic.
When selecting either the y-scale dynamic or x-scale dynamic, the
corresponding axis width automatically adjusts to show the entire
range of the µModule results after each batch of samples.
20).
21) select whether the data graph
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